Bending and straightening machine.



A. ROGGB. BENDING AND STRAIGHTENING MACHINE.

APPLICATION FILED FEB. 24, 1906.

Patented Dec. 29, 1908.

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A. ROGGE. BENDING AND STRAIGHTENING MACHINE. APPLIOATION FILED 1133.24,1906.

Patented Dec. 29, 19.08.

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APPLIOATION FILED FEB. 24, 1906.

Patented Dec.29,19os.

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A.' ROGGE. BEN DING AND STBAIGHTBNING MAGHINE. BPLI'OATION FILED rms.24, 1906.

907,889. n v l v Patented De0.29, 1908.

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specification of Letters Patent.

Patentes nee. 2e, 196e.

Applcatin filed February 24, 1906. Serial No.` 302,735.

T all 'whom it may con-cern:

Be it known that I, ALBRECHT Rosen, a subject of the King of Prussia,and a resident of Nordhafen 8, Berlin, Germany, have invented a new anduseful Improved Bending and Straightening Machine, of which thefollowing is the specification.

The present invention relates to bending machines and straighteningmachines for rolled-iron and the like.

In the case of hitherto known bending and straightening machinesforrolled-iron and the like it has hitherto been necessary to move thetool, such as a straightening stamp, situated opposite the straighteningplate or surface-plate by the instrumentality of such elements as permitthe working-stroke to be adjusted or to be regulated. This necessitywasdue to the circumstance that materials of the most various profileshadt be dealt with on one and the same machine. Such adjusting devices,however, cause the ma= chines to be somewhat complicated and moreover inoperation they were not reliable to the desired degree.

The present invention relates to a bending and straightening machine inwhich the tool or the slide for receiving the straightening or bendingstamp is set in action as soon as said slide is rigidly connected bymeans of a cotter or wedge or the like with the end of one or moreconnecting rods which continuously receive a uniform reciprocatingmotion by means of an eccentric or other suitable means. Now in order torender the machine provided with such a device for always imparting tothe tool a 'stroke of constant length highly serviceable for materialsor work, that is articles to be operated upon, of all possibledimensions, according to the present invention a device for finelyadjusting the surface-plate is provided, and consequently the means foradjustment are transferred to that place wh ere the greatest use of themcan most suitably be made.

The accompanying drawings illustrate by way of example two embodimentsof machines according to the present invention, in

the case of each embodiment the same reference characters designating inall figures the same parts.

In said drawings-Figure 1 is a side elevation of one embodiment of astraightening or bending machine according to the present invention, andFig. 2 is an end elevation showing the spur-wheel gear of said machine.Fig. 3 is an end elevation of the lower portion of the second embodimentof a machine according to the present invention, while Fig.- 4 is a sideelevation of the same, and Fig. 5 a plan of the same.

Referring to Figs. l and 2, a is the base plate which is cast in onepiece with the per# pendicular sides b b. Between the latter and at oneside is mounted the spur-wheel gear for driving the straightening stamparranged displaceably onthe other side.v c c are fast and loose pulleysarranged on the shaft d for switching the power on and off. Upon theshaft d is mounted the toothed wheel e which drives the larger toothedwheel f situated on the shaft g which carries a second smaller toothedwheel h keyed rigidly to it, which wheel 7LV transmits the motion whichis thus again reduced ver f much in correspondence with. the size of hewheel to two toothed wheels i fi f equal size mountedon the shafts 7c l.An eccentric m is situated centrally on each of said shafts 7c Z, themotion of said eccentrics being transmitted by means of eccentric rods nn to the slide o arranged at the front end of the machine, which slidecarries the straightening or bending stamp p which is adapted to beadjusted by means of the handle g. Said stamp p is arranged so as to becapable of being interchanged with other stamps as also are thesurface-plates or matrices r r which are fixed, for example bolted, onthe two iXed sides l) b. Said surface plates or matrices serve as aresistin support or abutment for the article or wor s to be ben-t whichin the drawing is represented as an I-beam. The pressure-surfaces orworking surfaces of the stamp p and of the matrices r 1i lie exactlyparallel to one another and at right angles to the motion of theeccentric rods n n. In order to avoid the necessity of having to switchoff the machine during the forward motion of the work the connectionbetween the eccentric rods n n and the slide o is not a rigid one, butit is effected by inserting cotters t or other suitable members whichcan be adjusted from the front of the machine suitably by means oftwo-arm levers u. The cotters t (shown in Fig. l) are linked to thelevers u which are pivoted to the frame of the machine. By drawing thelower ends of the levers u off from the machine the cotters are loweredand thereby brought out of contact with the rods n and the slide o,whereby then the rods n therefore the slide remains at rest.

move freely, whereas otherwise the slide is rigidly coupled with saidrods. In order to facilitate the forward motion of the Work it isadvantageous to support the latter upon rollers v o and in order toenable the machine to run uniformly a fly-wheel z is arranged on thefree end of the shaft d. The machine enables perfect work exact to amillimeter to be turned out and in consequence of its short compact formenables profile-iron to be bent to circles of about 1% meters diameter.On the other hand bent profile-iron can be made perfectly straightagain.

Referring to the embodiment illustrated in Figs. 3 to 5 this machine isdesigned especially for somewhat la" ge work. Nevertheless it can beemployed for treating small work, though said work cannot be bent tocircles of less than 3 meters diameter. The under frame A A of themachine consists of several, in this case three, T-beams extending fromone end of the machine to the other, and said frame suppo: ts thetoothed wheel gears B, C, D, E upon the shafts F G H supported on thesides. Said gear is driven from the beltpulley I on one end of the shaftF at the other outer end of which the ffy-wheel K is keyed. Upon theshaft H is situated an eccentric L the motion of which is transmitted bymeans of the eccentric. rod M tothe slide O which is adapted to receiveat its front end the bending or straightening tool, that is, the stamp Pwhich is capable of being interchanged with other stamps. The connectionbetween the eccentric rod M and the slide O is in this case also onewhich is capable of being readily disconnected. The connection issuitably effected by means of the wedge or cotter N which is inserted inslots or longitudinal holes R R in the slide O and the eccentric rod M,and which, for the purpose of undoing the connection, can be withdrawnby means of a lever gearing l Also the cotter N is suitably connectedwith a lever-gearing by which said cotter can be drawn out of the slotsR. Thereby the reciprocating rod M finds no resistance in its movementand The surface-plate T stands parallel and opposite to the slide O orthe bending stamp P and at right angles to the direction of motion ofthe sor/388e' slide, and the work S to be operated upon is placedbetween said slide or stamp and said surface-plate on rollers U. lf thework S is to be bent two suitable matrices T T2, indicated in dottedlines in Fig. 5, are arranged or fixed upon the surface-plate, forexample by means of bolts. The surface-plate T can be exactly adjustedby means of the screwed spindles V, V V2, V3, V 1, V5, said spindlesbeing operated from a lever lV (Fig. 3) by means of ratchet or likemechanism which in the example shown consists of the ratchet wheels X,X, X2, X3, X4, X5 keyed upon the ends of the screwed spindles and of thepawls Z, Z', Z2, Z3, Z4, Z adapted to be actuated by means of thesliding bars VI, and the links XV', 72, l" T3, connecting said slidingbars with the lever W. N ow as the motion of all the pawls is exactlythe same and also as all the ratchet wheels have exactly the. same shapeand because on the other hand, the screw threads on the spindles have anextremely small pitch, it follows that the distance of the surface-platefrom the working shaft H of the toothed wheel E can be adjusted to theutmost degree of accuracy.

The described arrangement for enabling ne adjustments to be made can beapplied to the stamp-plate or surface plate of the niachine shown inFigs. l and 2. The forward motion of the work can be effected by hand orautomatically by means of the machine.

That l claim as my invention and desire to secure by Letters Patent isz-In a bending and straightening machine the combination of a suitableframe, an anvil supported by said frame, a pair of eccentrics connectedby suitable gearing behind said anvil, an adjustable slide opposite saidanvil, a pair of eccentric rods connecting said eccentrics and saidslide for the purpose of drawing the slide towards the anvil, and keysheld by suitable lever gearing in order to disconnect the eccentric rodsand the slide.

In testimony whereof T have signed my name to this specification in thepresence of two subscribing witnesses.

ALBRECHT ROGG-IC.

Witnesses HENRY HAsrEn, WOLDEMAR HAUPT.

